Jeweler&#39;s gage.



H. V. BERNHARDT. JEWELER'S GAGE.

APPLICATION FILED JULY 13, 1909.

950,221. Patented Feb. 22, 1910.

WITNESSES firmwmw w HERMAN V. BERNHARDT, 0F NEWARK, NEW JERSEY. I

JEWELERS GAGE.

Specification of Letters Patent. 'AppIication filed July 13, 1909.SeriatNo. 507,296.-

Patented Feb. 22,1910.

T 0 all whom a'ma concern.

Be it known that I, HERMAN V. BERN- IIARDT, a citizen of theUnited-States, residing at Newark, in the county of Essex and State ofNew Jersey, have invented certain Improvementsin Jewelers Gages, ofwhich the following is a specification.

The objects of this invention are to pro- Vide a gage of improvedconstruction which can be used for determining the sizes and weights ofstones which are to be set, and also the sizes of mountings or settingsfor said stones; to provide such a gagereading upon one of its faces interms of weight as carats, and upon its other face in terms of size,such as millimeters, to provide such a gage which shall be very compactand convenient to carry in the-pocket or elsewhere; to secure greatsimplicity of the gage, both in its construction andin its use; to thusprovide a convenient gage by which stones and their settings can bemeasured quickly and accurately, and to obtain other advantages andresults as may be brought out in the following description.

Referring to the accompanying drawings, in which like numerals ofreference indicate corresponding parts in each of the several figures,Figures 1 and 2 are face views of my improved gage from its oppositesides, showing the carat and millimeter readings, respectively, and Fig.3 is a transverse section of the gage on line 3-3 of Fig. 2.

In said drawings, 15 indicates the body portion of my improved gage,which I have shown as approximately circular with a large opening 16 inthe middle, although it will be understood that the body portion mightbe of other shapes. Near the outer edge. of the said body portion orplate 15 is a series of outside-calipering apertures 20, 21, 22, 23,etc., and from said outer edge opposite the said apertures projectinsidecalipering projections 40, 41, 43, etc., the inner edge of thebody portion around the opening 16 providing a finger grasp or means forholding and handling the gage.

The body portion 15 is preferably formed of thin sheet material, and allin one piece, although it might be otherwise. The out side-caliperingapertures 20, 21, 22, etc., form a graduated series of sizes, as will beunderstood, any one of which may be selected and used in measuring agem. On

one side of the body portion 15 of the gage,

these graduated openings are marked in terms of carats, or weights ofstones, as shown in Fig. 1, while on the other side of the body portion15 the markings are'in terms of size, or in millimeters, as shown in 2.Each one of the said outside-calipermg apertures 20, 21, 22, 23, etc.,is preferably circular in shape, as shown, and all said apertures arearranged in close proximity to the outer edge of the body portion orplate 15.

From the outer edge of the body portion or plate 15, at points directlyopposite the outside-calipering apertures 20, 21, 22, etc., projectnarrow necks G0, 61, 62, 63, etc, These necks are preferably inlongitudinal alinement each with a line drawn through the center of theadjacentoutside caliperin aperture perpendicular to the periphera edgeof the bod portion 15, or substantially radial lines in the form of gageillustrated in the drawings.

At the outer end of each neck 60, 61, 62, &c., is an inside caliperingdisk 80, 81, 82, 83, etc., respectively, and the disk at the outer endof each neck is of the same size as the outside-calipering aperture atthe base of said neck. The markings above described upon the sides ofthe body portion or plate 15, adjacent to the outside-caliperingapertures 40, 41, 42, etc., therefore apply equally well to theinside-calipering disks 80, 81, 82, etc. Twoseries of markings are thusavoided, without any uncertainty or confusion to the operator, whoalways knows that any inside-caliperin projection is of the same size asthe outsi e-calipering aperture to which it is adjacent.

My improved gage is of especial advantage to jewelers and stone-setters,since in fitting a stone to a setting it is necessary only to find theaperture 20, 21, 22, 23, etc., through which the stone passes, and thenselect a setting into which the adjacent inside calipering projectionfits. N 0 time is lost nor inconvenience and confusion caused by havingto pass a considerable distance from one calipering means to the other,or over any intervening calipering means, in using my improved gage.Furthermore, a workman having one of my improved gages can instantlytranslate measurements from carats to millimeters, or vice versa, bysimply looking on'the other face of the gage. As for instance, if he isgiven carats and wishes to work to millimeters, he looks up the givencarat measurement on the face of the gage proved and then reads theequivalent size inmillimeters from the o posite face. Also myimgage wilserve for both preclous stones (which are measured in carats) an forimitation stones (which are measured in millimeters), and thus twogages.

Having thus described the invention, what I claim is:

1. A age compri itself ad acent to one takes the, place 0 ing a platehaving in of its edges an outsidecalipering aperture entirely surroundedby y calipering apertures, a

. tures bein side-calipering the plate, a neck projecting from said edgeof the plate in a direction away from said aperture and opposite saidaperture with respect to said edge,

of said necks, pering members and outside-calipermg aper- 1n separatedhnes'extendmg 1n the same direction and each aperture being thetwoseries of inside-callopposite an inside-calipering member of the samesize. 4

3.The hereindescribed gage comprising a body portion having in itseliadjacent to its edge a series of outside-calipering circula'r apertures,a series of necks projecting from said edge of the body portion, each incentral longitudinal alinement with the diameter of an aperture, andinside caliperingdisks at the outer ends of said necks, each disk beingthe same size as the aperture with whose diameter the neck supportingsaid disk is in alinement. v r 4. The hereindescribed gage, comprising asubstantially circular body portion of sheetmaterial having in itselfadjacent to the edge a series of outside-calipering apertures, a seriesof necks projecting from the edge of said body portion andinsidecalipermg disks at the outer ends of said necks, the center of an.aperture being in substantiall the same radial line of said circular b0y as the center of a disk and each'aperture and disk thus in radialalinementbeing of the same size.

' HERMAN V. BERNHARDT. In the presence of-- RUssnLL M. EVERETT, FRANCESE. BLonsEr'n'

